Finding the Third Proportional to 648,213 and 981,262

Step by Step Solution

1. Step 1: Write the proportion equation
   648,213 : 981,262 = 981,262 : x
2. Step 2: Convert to fraction form
   648,213/981,262 = 981,262/x
3. Step 3: Cross multiply
   648,213x = 981,262 × 981,262
4. Step 4: Simplify right side
   648,213x = 962,875,112,644
5. Step 5: Solve for x
   x = 962,875,112,644/648,213
6. Step 6: Final answer
   x = 1,485,430.12